package com.itheima.reggie.controller;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.itheima.reggie.common.R;
import com.itheima.reggie.dto.DishDto;
import com.itheima.reggie.entity.Category;
import com.itheima.reggie.entity.Dish;
import com.itheima.reggie.entity.DishFlavor;
import com.itheima.reggie.service.CategoryService;
import com.itheima.reggie.service.DishFlavorService;
import com.itheima.reggie.service.DishService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.web.bind.annotation.*;

import java.util.List;
import java.util.Set;
import java.util.concurrent.TimeUnit;
import java.util.stream.Collectors;


/*菜品管理*/
@Slf4j
@RestController
@RequestMapping("/dish")
public class DishController {

    @Autowired
    private DishService dishService;

    @Autowired
    private DishFlavorService dishFlavorService;

    @Autowired
    private CategoryService categoryService;

    @Autowired
    private RedisTemplate redisTemplate;

    /*新增菜品*/
    @PostMapping
    public R<String> save(@RequestBody DishDto dishDto){

        log.info("DishDTO:{}",dishDto.toString());

        dishService.saveWithFlavor(dishDto);

        return R.success("新增菜品成功");
    }

    /*菜品信息分页查询*/
    @GetMapping("/page")
    public R<Page> page(int page,int pageSize,String name){

        //构造分页构造器对象
        Page<Dish> pageinfo = new Page<>(page,pageSize);
        Page<DishDto> dishDtopage = new Page<>();

        //条件构造器
        LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();
        //添加过滤条件
        queryWrapper.like(name != null,Dish::getName,name);
        //添加排序条件
        queryWrapper.orderByDesc(Dish::getUpdateTime);

        //执行分页查询
        dishService.page(pageinfo,queryWrapper);

        //对象拷贝
        BeanUtils.copyProperties(pageinfo,dishDtopage,"records");

        List<Dish> records = pageinfo.getRecords();

        List<DishDto> list = records.stream().map((item)->{
            DishDto dishDto = new DishDto();
            BeanUtils.copyProperties(item,dishDto);
            System.out.println(dishDto.toString());
            Long categoryId = item.getCategoryId();//分类id
            Category category = categoryService.getById(categoryId);
            if (category!=null) {
                String categoryName = category.getName();
                dishDto.setCategoryName(categoryName);
            }
            return dishDto;

        }).collect(Collectors.toList());


        dishDtopage.setRecords(list);
        return R.success(dishDtopage);
    }

    /*根据id查询菜品信息和对应的口味信息*/
    @GetMapping("/{id}")
    public R<DishDto> get(@PathVariable Long id){
        DishDto dishDto = dishService.getByIdWithFlavor(id);
        return R.success(dishDto);
    }

    /*修改菜品*/
    @PutMapping
    public R<String> update(@RequestBody DishDto dishDto){
        log.info("DishDTO:{}",dishDto.toString());

        dishService.updateWithFlavor(dishDto);

        //清理所有菜品的缓存数据
//        Set keys = redisTemplate.keys("dish_*");
//        redisTemplate.delete(keys);

        //清理某个分类下面的菜品缓存数据
        String key = "dish_" + dishDto.getCategoryId() + "_1";
        redisTemplate.delete(key);

        return R.success("修改成功");
    }

    @PostMapping("/status/{status}")
    public R<String> update(@PathVariable int status,Long[] ids){
        log.info("status:{},ids:{}",status,ids);
        Dish dish = new Dish();
        dish.setStatus(status);
        for (Long id : ids) {
            dish.setId(id);
            dishService.updateById(dish);
        }
        return R.success("修改成功");
    }

    @DeleteMapping
    public R<String> delete(Long[] ids){

        for (Long id : ids) {
            dishService.removeById(id);
        }
        return R.success("删除成功");
    }

    /*根据条件查询菜品数据*/
    @GetMapping("/list")
    public R<List<DishDto>> list(Dish dish){
        List<DishDto> dishDtoList = null;
        String key = "dish_" + dish.getCategoryId() + "_" + dish.getStatus();//dish_1397844303408574465_1

        //先从redis中获取缓存数据
        dishDtoList = (List<DishDto>) redisTemplate.opsForValue().get(key);

        if (dishDtoList != null){
            //如果存在，直接返回，无需查询数据库
            return R.success(dishDtoList);
        }

        //
        //构造查询条件
        LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(dish.getCategoryId() != null,Dish::getCategoryId,dish.getCategoryId());
        queryWrapper.eq(Dish::getStatus,1);
        queryWrapper.orderByAsc(Dish::getSort).orderByDesc(Dish::getUpdateTime);
        List<Dish> list = dishService.list(queryWrapper);

        dishDtoList = list.stream().map((item)->{
            DishDto dishDto = new DishDto();
            BeanUtils.copyProperties(item,dishDto);
            System.out.println(dishDto.toString());
            Long categoryId = item.getCategoryId();//分类id
            Category category = categoryService.getById(categoryId);
            if (category!=null) {
                String categoryName = category.getName();
                dishDto.setCategoryName(categoryName);
            }
            Long dishId = item.getId();
            LambdaQueryWrapper<DishFlavor> lambdaQueryWrapper = new LambdaQueryWrapper<>();
            lambdaQueryWrapper.eq(DishFlavor::getDishId,dishId);
            List<DishFlavor> dishFlavorList = dishFlavorService.list(lambdaQueryWrapper);

            dishDto.setFlavors(dishFlavorList);
            return dishDto;

        }).collect(Collectors.toList());
        //如果不存在，需要查询数据库，将查询到的菜品数据胡拿出到Redis
        redisTemplate.opsForValue().set(key,dishDtoList,60, TimeUnit.MINUTES);

        return R.success(dishDtoList);
    }

}
